Question

You are running an experiment that uses an accelerator that
produces a 3.50-µA proton beam. Each proton in the beam has
48.5-MeV of kinetic energy. The protons impinge on, and come to
rest inside, a 51.0-g copper target within the vacuum chamber. You
are concerned that the target will get too hot and melt the solder
on some connecting wires that are crucial to the experiment.

(a) Determine the number of protons that strike the target per
second.
? s-1

(b) Find the amount of energy delivered to the target each
second.
? W

(c) Determine how much time elapses before the target temperature
increases by 271° C. (Neglect any heat released by the target. The
specific heat of copper is 0.386 kJ/kg · K.)
? s